Dong, Eddie wrote: > > Jan Kiszka wrote: > > > > So if you want the higher performance of PCIe you need > > performance-killing wbindv (not to speak of latency)? That sounds a > > bit contradictory to me. So this is also true for native PCIe usage? > > > > Mmm, I won't say so. When you want to get RT performance, you > won't use unknown OS such as Windows. If you use your RT > linux, the OS (guest) itself should not use wbinvd. > The idea is to have a RT-Linux on the host that runs RT jobs but also use it to run mgmt/other code on windows guests. This way you can better utilize an idle RT linux while keeping short latencies for the RT jobs. Dor. > > For the Bochs BIOS case, like Avi mentioned, we can simply remove it. > > > > What really frightens me about wbinvd is that its latency "nicely" > > scales with the cache sizes. And I think my observed latency > > is far from > > being the worst case. In a different experiment, I once measured > > wbinvd latencies of a few milliseconds... :( > > > I don't know details, but it could be. While RT usage can easily remove > this instruction. > > thx,eddie > > ------------------------------------------------------------------------- > This SF.net email is sponsored by: Splunk Inc. > Still grepping through log files to find problems? Stop. > Now Search log events and configuration files using AJAX and a browser. > Download your FREE copy of Splunk now >> http://get.splunk.com/ > _______________________________________________ > kvm-devel mailing list > kvm-devel@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/kvm-devel >
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